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EP3339817B1 - Dispositif de dosage pour substances en poudre - Google Patents

Dispositif de dosage pour substances en poudre Download PDF

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Publication number
EP3339817B1
EP3339817B1 EP16206342.4A EP16206342A EP3339817B1 EP 3339817 B1 EP3339817 B1 EP 3339817B1 EP 16206342 A EP16206342 A EP 16206342A EP 3339817 B1 EP3339817 B1 EP 3339817B1
Authority
EP
European Patent Office
Prior art keywords
discharge
closure member
metering device
region
longitudinal axis
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP16206342.4A
Other languages
German (de)
English (en)
Other versions
EP3339817A1 (fr
Inventor
Sandra Ehrbar
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mettler Toledo Schweiz GmbH
Original Assignee
Mettler Toledo Schweiz GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mettler Toledo Schweiz GmbH filed Critical Mettler Toledo Schweiz GmbH
Priority to EP16206342.4A priority Critical patent/EP3339817B1/fr
Priority to JP2017242465A priority patent/JP7138429B2/ja
Priority to US15/847,209 priority patent/US10399721B2/en
Priority to CN201711400880.1A priority patent/CN108216698B/zh
Publication of EP3339817A1 publication Critical patent/EP3339817A1/fr
Application granted granted Critical
Publication of EP3339817B1 publication Critical patent/EP3339817B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B1/00—Packaging fluent solid material, e.g. powders, granular or loose fibrous material, loose masses of small articles, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
    • B65B1/04—Methods of, or means for, filling the material into the containers or receptacles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B39/00—Nozzles, funnels or guides for introducing articles or materials into containers or wrappers
    • B65B39/001—Nozzles, funnels or guides for introducing articles or materials into containers or wrappers with flow cut-off means, e.g. valves
    • B65B39/004—Nozzles, funnels or guides for introducing articles or materials into containers or wrappers with flow cut-off means, e.g. valves moving linearly
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F13/00—Apparatus for measuring by volume and delivering fluids or fluent solid materials, not provided for in the preceding groups
    • G01F13/001—Apparatus for measuring by volume and delivering fluids or fluent solid materials, not provided for in the preceding groups for fluent solid material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B1/00—Packaging fluent solid material, e.g. powders, granular or loose fibrous material, loose masses of small articles, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
    • B65B1/30—Devices or methods for controlling or determining the quantity or quality or the material fed or filled
    • B65B1/40—Devices or methods for controlling or determining the quantity or quality or the material fed or filled by timing of filling operations
    • B65B1/42—Devices or methods for controlling or determining the quantity or quality or the material fed or filled by timing of filling operations and arresting flow by cut-off means

Definitions

  • the invention relates to a dosing device for substances in powder or paste form, which has a dosing head which can be connected to a source or removal vessel or is connected thereto.
  • Dosing devices are used in particular when dosing small amounts, for example toxic substances, with high precision into small target vessels.
  • target containers are often placed on a scale in order to weigh the amount of substance discharged from the metering device, so that it can then be further processed as intended.
  • the substance to be dosed is located, for example, in a withdrawal vessel, which is connected to the dosing head and forms a unit with it—the dosing device—for dosing. It is desirable here to discharge the substance to be dosed through a small opening of the dosing device, so that it can also be filled in a targeted manner into a vessel with a small opening cross section.
  • Dosing devices for dry and/or powdered bulk material for example dye powder
  • a device for dosing which consists of a dispensing container with a closable outlet on its underside.
  • a conical, upwardly tapering valve body which can be adjusted vertically downwards to open an outlet opening, serves as a closure, which valve body rotates in its open position and has means for conveying the material in the direction of the outlet opening.
  • the device described above is less suitable for dosing bulk material into vessels with a small opening cross section.
  • the upwardly tapering structure of the valve body and its rotation result in a radial or horizontal component of the bulk material particles at the outlet and consequently cause a scattering that can even extend beyond a relatively wide opening cross section of a vessel to be filled.
  • a dosing device for dosing predefined volumes of material with an outlet section which defines a fixed volume.
  • the volume of the outlet section is defined by two Elements, the arrangement of which is such that when the inlet opening is closed, the outlet opening is open and vice versa.
  • a finger-held and operated hand-sized seed dispenser is known from US 4,084,726A and has a seed hopper having an open end through which the hopper can receive the seeds to be metered, the open end being closed by a removable spout through which the seeds can pass.
  • a seed dispensing wand extends through the container and spout and beyond the enclosed end and has a finger piece, the wand having a cylindrical portion which normally closes the open end of the spout against escape of seeds until the wand is finger operated.
  • the stick has a longitudinal groove for the passage of the seeds and a transverse groove to facilitate the entry of the seeds into the longitudinal groove.
  • a method and a device for discharging a powder or paste-like sample of small amounts, for example for atomic absorption spectroscopy discloses US 4,905,525A .
  • a stamp protrudes from above into the sample material in the container.
  • a small amount of sample is forced through the mold channel and discharged from the outlet opening by pushing the plunger into the sample material so that it compacts above the mold channel.
  • the container is funnel-shaped towards the outlet opening and the plunger is arranged at an angle to the outlet opening.
  • a dosing device for filling viscous, pasty, powdery or granular products, with a dosing container, the dosing device positioned for operation tapers towards its lower end and has an outlet opening arranged there. Stripping tools are attached to a centrally arranged rotatable hollow shaft.
  • the dosing device has a dosing valve which has a valve rod which is arranged in the hollow shaft and can be moved translationally up and down, at the lower end of which a conically tapering valve head is arranged, so that the discharge quantity of the filling material is regulated and the discharge opening is closed from above can be.
  • the metering valve is also designed to be rotatable.
  • the quantity to be discharged from the container cannot be arbitrarily small being held. Since the outlet opening is annular, the minimum width of the annular gap that can be used for dosing is limited to at least the extent of a smallest bulk material unit—for example a powder grain—so that several bulk material units can emerge from the annular gap at the same time. There is also the risk that, depending on the nature of the bulk material, part of the gap may become clogged. This can be done in particular when, towards the end of the dosing process, the discharge rate is to be reduced by reducing the width of the annular gap, since its width becomes steadily less favorable in relation to its length or circumference.
  • the EP 1 931 950 B1 a dosing device with a discharge and closure element is shown, which overcomes the disadvantages mentioned above and enables a targeted dosing of very small amounts of powdery or pasty substances into a vessel.
  • the EP 1 931 952 B1 additionally proposes a feed tool that is mounted and guided relative to the discharge and closure element so that it can move in a translatory manner along its central longitudinal axis, whereby it is always in loose contact with the edge of the housing surrounding the outlet opening when the dosing device is in operation. This is to ensure that even with the smallest passage opening, sufficient substance to be metered is always supplied to the same.
  • a dosing device with a discharge and closure element according to the EP 1 931 950 B1 and EP 1 931 952 B1 turned out to be disadvantageous when it comes to dosing larger filling quantities with constant accuracy, since the discharge quantity per time is limited by the cross section of the discharge and closure element.
  • Merely increasing the cross section of the discharge and closure element can lead to the powdery or paste-like substance not being fed in sufficiently, which affects the consistency of the filling, or that the accuracy tolerance of the target quantity to be filled is not achieved.
  • a further task is to be able to discharge strongly coagulating substances or pastes with the dosing device.
  • a dosing device for substances in powder or paste form with a removal vessel and a dosing head connected or connectable thereto which has a housing with an outlet opening provided with a circular cross section and a discharge and closure element.
  • the outlet opening and the discharge and closure element are arranged on a central longitudinal axis of the dosing head, the discharge and closure element being designed to be rotatable relative to the housing about the central longitudinal axis of the dosing head and to be translationally displaceable along the central longitudinal axis of the dosing head with respect to the housing.
  • the discharge and closure element is cylindrical in its basic shape, has a closure area that serves to close the outlet opening, a discharge area that is arranged adjacent to the closure area and that serves to discharge substance to be dosed and forms a cylindrical lateral surface, and a shaft area that is arranged adjacent to the discharge area.
  • the closure area is arranged below the discharge area and forms an end face at the lower end of the discharge and closure element.
  • the discharge area is provided with a recess starting from the jacket of the cylindrical basic shape of the discharge and closure element.
  • the discharge and closure element also has a supply body which is molded onto the cylindrical lateral surface of the discharge area and serves to feed the substance to the outlet opening, and the recess extends over the discharge area and the molded feed body, thereby forming a continuously running discharge surface.
  • the feed body which is molded directly onto the discharge area and forms a continuous discharge surface with the recess, improves the discharge of larger quantities of powdery or pasty substances through uninterrupted transport with minimal resistance for the substance from the extraction vessel, through the dosing head, into an underlying one Vessel. It is possible to fill a vessel more quickly in a targeted manner and while maintaining the previous accuracy tolerance of the target quantity to be filled.
  • the discharge surface forms part of a lateral surface of a recess with a cylindrical basic shape, the central longitudinal axis of this cylindrical basic shape defining the discharge direction of the discharge and closure element in which the powdery or pasty substances leave the discharge and closure element during operation during discharge.
  • the supply body is arranged from the central longitudinal axis of the discharge and closure element in the direction of the discharge, or the supply body is arranged from the central longitudinal axis of the discharge and closure element in the opposite continuation of the discharge direction.
  • the discharge direction and the end face of the discharge and closure element formed by the closure element enclose an acute angle ⁇ of >0° to 45°.
  • a further improved discharge results when the acute angle ⁇ is in a range between 15° and 25°.
  • the discharge surface is concavely curved.
  • the discharge surface can advantageously also be concavely curved in two directions, with a second recess forming part of a lateral surface of a second cylindrical basic shape in the second direction, and with the central longitudinal axis of this second cylindrical basic shape forming an obtuse angle ⁇ with the central longitudinal axis of the discharge and locking element includes.
  • the obtuse angle ⁇ can range between 90° and 135°.
  • the concave curvature of the discharge surface 104 in two directions again significantly improves the discharge of larger amounts of powdery or pasty substances.
  • a cylinder is a body that is delimited by a cylindrical surface (lateral surface) with a closed directrix and two parallel planes, the base surfaces of the cylinder.
  • the recesses on the discharge and closure element have a cylindrical basic shape. Where these basic shapes intersect with the discharge area, the material of the discharge and closure element is removed.
  • the two angles ⁇ and ⁇ define the basic cylindrical shapes relative to the discharge and closure element.
  • the integrated supply body when installed in a dosing head, is arranged in front of the outlet opening of a funnel element of the dosing head in the conveying direction of the substance in powder or paste form.
  • the integrated feed body has an edge contour that follows the inner contour of the funnel element. Furthermore, when the discharge and closure element is fully extended in the operating state of the dosing device, the integrated supply body can essentially always be in loose contact with the inner contour of the funnel element along its jacket contour, or the integrated supply body can be in the operating state of the dosing device with the discharge and discharge element fully extended and closure element spaced along its outer contour with an intermediate gap from the inner contour of the funnel element.
  • this one of the above variants has an advantage over the other variant in terms of improving the discharge of larger amounts of substance.
  • the inner contour of the funnel element is funnel-shaped with a cylindrical intermediate section. This improves the supply of substance to be discharged.
  • the shaft area has a smaller diameter than the discharge area, and the discharge area has a smaller diameter than the closure element.
  • the molded supply body is designed as a scraper. Due to the rotation of the discharge and closure element, the supply body conveys the substance to be discharged to the outlet opening and thereby improves the faster discharge of larger quantities of the substance to be discharged.
  • a feed tool 3 is used in a figure 1
  • a feed tool 3 is arranged inside the dosing head 1 .
  • This has a holding device with which it encompasses the rod 4 in a ring at two positions arranged one above the other, as a result of which the feed tool 3 is loosely connected to the rod 4 .
  • the feed tool 3 has a stirring part 2 and a scraper or shovel-shaped feed element 6.
  • An upper retaining ring 5 of the holding device of the feed tool 3 is arranged above a cross bolt 9 firmly connected to the rod 4, a lower retaining ring 8 below the cross bolt 9.
  • the feed tool 3 is guided in the dosing device.
  • the loose connection of the feed tool 3 to the rod 4 ensures that the feed tool 3 always remains in loose contact with the edge 13 of the outlet opening 7.
  • contact between the transverse bolt 9 and the stirring part 2 causes the feed tool 3 to rotate as well.
  • FIGs 2a to 2d the design of a discharge and closure element 10, as has already been described in the prior art, can be seen in various views: in Figure 2a laterally facing the discharge area 14, in Figure 2b compared to the representation of Figure 2a rotated by -90°, in Figure 2c and in Figure 2d in a three-dimensional representation.
  • the recess in the discharge area 12 is delimited by a concave discharge surface 14, the edges of which are not aligned parallel to the plane orthogonal to the central longitudinal axis, but enclose any desired angle with it.
  • Such a recess can be produced by means of a cylindrical recess at an angle other than 90° to the central longitudinal axis.
  • a discharge and closure element 100 according to the invention is now shown: in Figure 3a laterally facing the discharge area 104, in Figure 3b compared to the representation of Figure 3a rotated by -90°, and in Figure 3c compared to the representation of Figure 3a turned by 90 degrees.
  • the discharge and closure element 100 according to the invention has a closure area 101 which, in interaction with a funnel element (see Figures 4a and 4b ) closes a closure opening of it.
  • Adjacent to the closure element 101 is a cylindrical discharge area 102, the diameter of which is somewhat smaller than that of the closure area 101, in order, as already mentioned above, to have sufficient play for rotation in the open state.
  • the discharge area 102 is characterized by a recess in the lateral surface of the cylinder forming the discharge area 102 .
  • the discharge and closure element 100 in the Figures 3a to 3c an integrated supply body 103 which is arranged to the right of the central longitudinal axis from the perspective of the observer and which is formed onto the lateral surface of the cylindrical discharge region 102.
  • the supply body 103 forms a surface which is common to the recess of the discharge area 102 and which advantageously takes the form of a continuous discharge surface 104 .
  • Discharge surface 104 forms part of a lateral surface of a recess with a basic cylindrical shape, with the central longitudinal axis of this basic cylindrical shape defining the discharge direction A R of discharge and closure element 100, in which the substances in powder or paste form convey the discharge and closure element 100 during operation during discharge leaves.
  • the discharge direction A R of the discharge surface 104 is advantageously inclined at an acute angle ⁇ , which is defined with respect to the end face 105 of the discharge and closure element 100 .
  • the in the Figures 3a to 3c (and Figures 4a and 4b ) discharge surface 104 shown is concavely curved in two directions, wherein in the second direction the second recess forms part of a lateral surface of a second cylindrical basic shape.
  • the central longitudinal axis 116 of this second cylindrical basic shape encloses an obtuse angle ⁇ with the central longitudinal axis 115' of the discharge and closure element 100 (coinciding with the central longitudinal axis 15 of the dosing head 1).
  • This shaping by means of two recesses favors the flow of the substance to be dosed.
  • the transitions from different surface areas are identified by thinner lines. At these lines, the curvature changes from one surface area to the neighboring surface area.
  • the lateral contour 108 of the in Figure 3a The feed body 103 shown is corresponding to the funnel member 106 (See Figures 4a and 4b ) pronounced. Accordingly, this contour can also have a different shape for the funnel element, such as a funnel-shaped shape with no or at least one cylindrical intermediate section 108.
  • FIGS Figures 3b and 3c are views rotated about the central longitudinal axis 115' and allow a better representation of the discharge surface 104 ( Figure 3b ) and the feed body 103 ( Figure 3c ).
  • FIG 4a the discharge and closure element 100 is shown opposite the funnel element 106 of the dosing head.
  • the closure area 101 closes the outlet opening 107, which corresponds to the closed operating position.
  • a continuous flow of the powdered or pasty substance is improved by means of a rotation transmitted to the discharge and closure element 100 , which can be combined with the translatory movement, since the supply body 103 maintains the pourability within the funnel element 106 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Quality & Reliability (AREA)
  • Supply Of Fluid Materials To The Packaging Location (AREA)
  • Basic Packing Technique (AREA)

Claims (12)

  1. Dispositif de dosage pour substances pulvérulentes ou pâteuses comportant un réservoir de prélèvement et une tête de dosage (1) reliée ou pouvant être reliée à celuici, et présentant un boîtier avec une ouverture de sortie (7, 107) à section circulaire et un élément de décharge et de fermeture (100), dans lequel l'ouverture de sortie (7, 107) et l'élément de décharge et de fermeture (100) sont disposés sur un axe longitudinal central (15) de la tête de dosage (1), et dans lequel l'élément de décharge et de fermeture (100) est conçu pour être rotatif par rapport au boîtier autour de l'axe longitudinal central (15) de la tête de dosage (1) et déplaçable en translation le long de l'axe longitudinal central (15) de la tête de dosage (1) par rapport au boîtier,
    dans lequel l'élément de décharge et de fermeture (100)
    - est cylindrique dans sa forme de base,
    - présente une zone de fermeture (101) servant à fermer une ouverture de sortie (107),
    - présente une zone de décharge (102) qui est disposée à côté de la zone de fermeture (101), sert à décharger la substance à doser et forme une surface d'enveloppe cylindrique, et
    - présente une zone d'arbre (114) disposée à côté de la zone de décharge (102), et dans lequel la zone de fermeture (101) est disposée sous la zone de décharge (102) dans l'état opérationnel et forme une surface frontale (105) à l'extrémité inférieure de l'élément de décharge et de fermeture (100), et
    dans lequel la zone de décharge (102) est pourvue d'un évidement partant de l'enveloppe de la forme de base cylindrique de l'élément de décharge et de fermeture (100),
    caractérisé en ce que
    l'élément de décharge et de fermeture (100) présente en outre un corps d'alimentation (103) qui est formé sur la surface d'enveloppe cylindrique de la zone de décharge (102) et sert à amener la substance à l'ouverture de sortie (107),
    et en ce que l'évidement s'étend sur la zone de décharge (102) et le corps d'alimentation formé (103), formant ainsi une surface de décharge s'étendant de manière continue (104),
    dans lequel la surface de décharge (104) fait partie d'une surface d'enveloppe d'un évidement de forme de base cylindrique, dans lequel l'axe longitudinal central de cette forme de base cylindrique définit la direction de décharge (AR) de l'élément de décharge et de fermeture (100) dans laquelle les substances pulvérulentes ou pâteuses quittent l'élément de décharge et de fermeture (100) pendant le fonctionnement lors de la décharge,
    et dans lequel le corps d'alimentation (103) est disposé à partir de l'axe longitudinal central (115') de l'élément de décharge et de fermeture (100) dans la direction de décharge (AR) ou dans le prolongement inverse de la direction de décharge (AR).
  2. Dispositif de dosage selon la revendication 1, caractérisé en ce que la direction de décharge (AR) et la surface frontale (105) de l'élément de décharge et de fermeture (100) formé par l'élément de fermeture (100) forment un angle aigu (α) de > 0° à 45° .
  3. Dispositif de dosage selon la revendication 2, caractérisé en ce que l'angle aigu (α) se situe dans une plage comprise entre 15 et 25° .
  4. Dispositif de dosage selon l'une des revendications 1 à 3, caractérisé en ce que la surface de décharge (104) est incurvée de manière concave.
  5. Dispositif de dosage selon l'une des revendications 1 à 4, caractérisé en ce que la surface de décharge (104) est incurvée de manière concave dans deux directions, dans lequel un second évidement fait partie d'une surface d'enveloppe d'une seconde forme de base cylindrique dans la seconde direction, et dans lequel l'axe longitudinal central de cette seconde forme de base cylindrique forme un angle obtus (β) avec l'axe longitudinal central (115') de l'élément de décharge et de fermeture (100).
  6. Dispositif de dosage selon la revendication 5, caractérisé en ce que l'angle obtus (β) se situe dans une plage comprise entre 90 et 135° .
  7. Dispositif de dosage selon l'une des revendications 1 à 6, caractérisé en ce que le corps d'alimentation intégré (103) lorsqu'il est installé dans une tête de dosage (1) est disposé devant l'ouverture de sortie (107) d'un élément d'entonnoir (106) de la tête de dosage (1) dans la direction de transport de la substance pulvérulente ou pâteuse.
  8. Dispositif de dosage selon la revendication 7, caractérisé en ce que le corps d'alimentation intégré (103) présente un contour de bord (108) qui suit le contour intérieur de l'élément d'entonnoir (106).
  9. Dispositif de dosage selon l'une des revendications 7 ou 8, caractérisé en ce que le corps d'alimentation intégré (103) est toujours sensiblement en contact lâche le long de son contour d'enveloppe (108) avec le contour intérieur de l'élément d'entonnoir (106) à l'état de fonctionnement du dispositif de dosage lorsque l'élément de décharge et de fermeture (100) est complètement sorti.
  10. Dispositif de dosage selon l'une des revendications 7 ou 8, caractérisé en ce que le corps d'alimentation intégré (103) est espacé le long de son contour d'enveloppe (108) par un espace intermédiaire du contour intérieur de l'élément d'entonnoir (106) à l'état de fonctionnement du dispositif de dosage lorsque l'élément de décharge et de fermeture (100) est complètement sorti.
  11. Dispositif de dosage selon l'une des revendications 8 à 10, caractérisé en ce que le contour intérieur de l'élément d'entonnoir (106) est en forme d'entonnoir avec une section intermédiaire cylindrique (108).
  12. Dispositif de dosage selon l'une des revendications 1 à 11, caractérisé en ce que la zone d'arbre (114) a un diamètre plus petit que la zone de décharge (102), et la zone de décharge (102) a un diamètre plus petit que l'élément de fermeture (101).
EP16206342.4A 2016-12-22 2016-12-22 Dispositif de dosage pour substances en poudre Active EP3339817B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP16206342.4A EP3339817B1 (fr) 2016-12-22 2016-12-22 Dispositif de dosage pour substances en poudre
JP2017242465A JP7138429B2 (ja) 2016-12-22 2017-12-19 粉末形態の物質のための計量－分注デバイス
US15/847,209 US10399721B2 (en) 2016-12-22 2017-12-19 Dosage-dispensing device for substances in powder form
CN201711400880.1A CN108216698B (zh) 2016-12-22 2017-12-22 用于呈粉末形式的物质的剂量分配装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16206342.4A EP3339817B1 (fr) 2016-12-22 2016-12-22 Dispositif de dosage pour substances en poudre

Publications (2)

Publication Number Publication Date
EP3339817A1 EP3339817A1 (fr) 2018-06-27
EP3339817B1 true EP3339817B1 (fr) 2022-06-01

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EP16206342.4A Active EP3339817B1 (fr) 2016-12-22 2016-12-22 Dispositif de dosage pour substances en poudre

Country Status (4)

Country Link
US (1) US10399721B2 (fr)
EP (1) EP3339817B1 (fr)
JP (1) JP7138429B2 (fr)
CN (1) CN108216698B (fr)

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EP2458345B1 (fr) * 2010-11-26 2020-09-23 Mettler-Toledo GmbH Système de dosage
DE102013109633A1 (de) * 2013-09-04 2015-03-05 Sig Technology Ag Vorrichtung zur Steuerung der Durchflussmenge
BR112016026477A2 (pt) * 2014-05-13 2017-08-15 Smidth As F L Aparelho de preparação de amostra de dosagem e limpeza e métodos do mesmo

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EP3339817A1 (fr) 2018-06-27
CN108216698A (zh) 2018-06-29
JP7138429B2 (ja) 2022-09-16
US10399721B2 (en) 2019-09-03
JP2018104093A (ja) 2018-07-05
US20180178937A1 (en) 2018-06-28
CN108216698B (zh) 2022-03-15

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